Vintage BMW Motorcycle Owners

Can someone help me? I want to know where the wires come out of the ignition board. In other words, i want to know to what are they connected to:
The two brown wires,
The green wire,
The gray wire and
The yellow with a red line wire.

thanks

Marco

The brown wires are ground. I will check my notes on the other ones tomorrow

Need to know the numbers on the board the wires are going to

My wiring diagrams for the /2 series do not show a yellow with red stripe wire.

Marco, the most important thing is the numbers on the board. They correspond to the numbers on the wiring diagram and most people on the forum can tell you what number goes to what item almost from memory.

Since you have an repop/aftermarket board the factory wire colors will most likely not match the BMW diagram. Write the wire colors and what number lug/solder point they go to and save it in the R50S folder.

I always use paint to fill in the numbers so I can see them when it is mounted upside down.

By the way I am almost done with my full restoration of an R50S and if you need anything let me know. You can email me at webmaster@vintagebmw.org

Thank you Jwonder for you help

31 Brown
30/51 Grey
15/54 Green
56 Yellow/Red

Regards,

Marco A.

30/51 (it's just 51 in my diagram) should be a red wire going to terminal 30/51 on the generator

31 should have multiple brown wires going to 31 on the generator, a junction connector to the rear lights, and to terminal 31 at the headlights

15/54 should have multiple wires going to 15 on indicator flasher, to a connection for the neutral/gen light in the headlight shell, and to a terminal on the horn

56 should have a couple of wires going to 56 on the highbeam/horn switch and to the speedometer indicator light

My DC circuit skills are so-so, but that is what I see in my book.

The bosch switch board was used in several other bikes like jawa only colors were different

green is same as 15/54
terminal 15/54 provides power to horn/brake light switch/flasher unit
green wire to center terminal of red/green indicator bulbs

yellow/red # 56 terminal to headlight switch power for high/low headlight beam

grey wire #58 tail light and small running light in headlight and speedo bulb (same as screw terminal next to it)

brown #31 ground large brown to #31 ground on generator/ground in headlight shell
one brown not used